JPH0736347B2 - High voltage connector integrated molding method - Google Patents

Description

Description: “Purpose” (Industrial field of application) The present invention relates to a method for integrally molding a high-voltage connector, and more particularly, to a high-voltage power cord of a desired electric device, twisting of the cord, and disconnection of the cord. , A method of integrally molding a high-voltage connector that prevents occurrence of short circuits, insulation defects, and the like.

(Prior Art) Since a high-voltage connector for power supply of a high-voltage cord, a plug, and the like, which are conventionally provided in electric equipment, are molded from a material different from the cord, the degree of adhesion between the cord and the material is low,
In many cases, the function as a high-voltage connector or plug cannot be fulfilled due to twisting of the cord, disconnection of the cord, short circuit, poor insulation, etc.

(Problems to be solved by the invention) In order to eliminate the drawbacks, conventionally, as shown in FIG. 6, a portion to be a main body of a connector or a plug is partially concave around the outer periphery of an insulating coating of a power cord. After cutting, it is introduced into a mold, and a molten synthetic resin is injected and molded to prevent the power cord from twisting or coming off. However, since the recessed insulating coating is thin, a defect such as impairing the insulating property at that portion cannot be avoided.

Further, a method of winding a metal member around a portion which should be a main body of a connector or a plug has been implemented, but this is also troublesome.

(Means for Solving the Problem) The present invention is intended to eliminate the above-mentioned drawbacks, and its gist is to provide a screw groove on the inner periphery and a plurality of protrusions for injecting a molten synthetic resin solution on the outer periphery, A substantially semi-cylindrical upper core having a guide pin at the center of the split surface in the longitudinal direction, a threaded groove corresponding to the upper core, an inner periphery, and a plurality of protrusions for inflowing the molten synthetic resin solution to the outer periphery, In a core set consisting of a substantially semi-cylindrical lower core having holes for fitting these guide pins in the longitudinal direction of the dividing surface, corresponding to the guide pins, a high voltage connecting the required lug terminals A cord is pierced through the core set, and the guide pin of the upper core is fitted in the guide pin fitting hole of the lower core to form a required gap on the split surface of the upper and lower cores. And the core set and the high voltage cord are guided into the upper and lower molds, and the upper and lower molds are closely attached. And a step of injecting a required molten synthetic resin into the upper and lower molds, and a step of releasing the molten synthetic resin after cooling and curing, and by using the pressure of the upper and lower molds This is an integral molding method for a high-voltage connector that compresses a child.

"Structure" (Embodiment) An embodiment of a method for integrally molding a high-voltage connector according to the present invention will be described with reference to the drawings. 1 to 5, a female lug terminal 16 is connected to the tip of a high voltage cord 14 (for example, a power cord of a television) by crimping or soldering.

Form a screw groove 22a around the inner periphery of the substantially semi-cylindrical upper core 22,
A plurality of protrusions 22b are provided at regular intervals on the outer periphery thereof, and a guide pin 22d is provided vertically at the center of the divided surface 22c in the longitudinal direction. As shown, the portion of the longitudinal dividing surface 22c on which the guide pin 22d is provided partially bulges to reinforce.

Similarly, a screw groove 24a is formed on the inner periphery of the substantially semi-cylindrical upper core 22, and a plurality of protrusions 24b are provided on the outer periphery thereof at regular intervals, and the upper core 22 is provided at the center of the longitudinal dividing surface 24c. These guide pins 2 are provided at the locations corresponding to the guide pins 22d of
A 2d fitting hole 24d is bored, and the periphery of the fitting hole 24d is expanded and reinforced as shown in the drawing.

And the height of the vertical pin 22d provided in the substantially semi-cylindrical upper core 22 and the depth of the fitting hole 24d formed in the lower core 24 are
As shown in FIG. 3, the substantially semi-cylindrical upper core 22 is replaced with the lower core.
When the vertical pin 22d is fitted into the fitting hole 24d in accordance with 24, the former longitudinal dividing surface 22c and the longitudinal dividing surface 24c do not come into close contact with each other, and a constant interval is provided on these surfaces. The molten synthetic resin injected and injected is easily introduced into the core set 20 composed of the upper and lower cores 22 and 24.

Into the curved portion of the lower core 24 of the core set 20, guide the required portion of the high voltage cord 14 described above, align the upper core 22 with the lower core 24, and fit the guide pin 22d of the latter. The former is fitted into the fitting hole 24d to be integrated.

The high voltage cord 14 and the core set 20 are guided and fixed in the cavity 32a of the lower mold 32 as shown in FIG. 3, and the upper mold 30 is fitted to the lower mold 32. The latter positioning pin 32b is fitted into the former fitting hole (not shown) to be integrated, and the molten synthetic resin is injected and injected from the injection hole 32c.

The molten synthetic resin injected is injected at high temperature (about 300 ° C) and high pressure (about 70kg / 1cm ² ). If the resin is cooled and cured and then released from the mold, a high voltage connector 12 as shown in Figs.
Is obtained.

Since the plurality of protrusions 22b and 24b are formed on the upper and lower cores 22 and 24 of the core set 20, the molten synthetic resin injected from the injection hole 32c is guided into the cavity of the mold without any trouble. I can do things.

[Operation and Effect] As described above, the high voltage cord 14 to which the female lug terminal 16 is connected is penetrated into the core set 20 to be integrated into the cavity of the upper and lower molds 30 and 32. 32a, the high voltage cord 14 is compressed in the core set 20, and the upper and lower cores 22 and 24 are screwed into the threaded grooves 22a and 24a, respectively. Since the pressure contact is made, a high voltage connector can be obtained in which twisting of the high voltage cord 14 and disconnection of the cord are completely eliminated in the molding process.

Since the insulating coating is not partially cut into a concave shape as in the known example, the occurrence of short circuit, insulation failure, etc. can be prevented, and a water leakage preventing effect can be obtained.

Therefore, the molding method becomes easy and low-cost manufacturing becomes possible.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of upper and lower cores and a high voltage cord used in an embodiment of a method for integrally molding a high voltage connector according to the present invention, and FIG. 2 is a core penetrating the high voltage cord. FIG. 3 is a perspective view showing a state in which the set is integrated, and FIG.
FIG. 4 is a perspective view of upper and lower molds for guiding the core set, FIG. 4 is a perspective view of a high-voltage connector molded by the method of the present invention,
FIG. 5 is a perspective side view of FIG. 4, and FIG. 6 is a partial perspective view showing a state in which a portion to be a main body of the connector is partially cut around the outer periphery of the insulating coating of the power cord. 12 …… High voltage connector ； 14 …… High voltage cord ； 16 …… Lug terminal ； 18 …… Core set ； 22 …… Upper core ； 22a …… Screw groove ； 22b …… Protrusion for molten synthetic resin inflow 22c ...... Split surface; 22d ...... Guide pin; 24 ...... Lower core; 24a ...... Threaded groove; 24b ...... Molten synthetic resin inflow projection; 24c ...... Disassembly surface; 24d ...... Guide pin Mating hole; 30 …… Upper mold; 32 …… Lower mold.

Claims (1)

[Claims] 1. A screw groove on the inner periphery, a plurality of protrusions for inflowing a molten synthetic resin liquid on the outer periphery, and a guide at the center of the split surface in the longitudinal direction.
A substantially semi-cylindrical upper core having a pin, a threaded groove corresponding to the upper core, an inner periphery, a plurality of projections for inflowing a molten synthetic resin liquid, and the guide in the longitudinal direction of the dividing surface. In a core set consisting of a substantially semi-cylindrical lower core having holes for fitting these guides and pins at the pin-corresponding parts; a high-voltage cord connected to the required lug terminals is passed through the core set And then fitting the guide pins of the upper core into the guide pin fitting holes of the lower core to form a required gap on the split surfaces of the upper and lower cores; And lead the high voltage cord into the upper and lower mold,
These processes include a step of closely contacting the upper and lower molds; a step of injecting a required molten synthetic resin into the upper and lower molds; a step of cooling and curing the molten synthetic resin, and then releasing from the upper and lower molds. A method of integrally molding a high-voltage connector, in which the upper and lower cores are compressed by using.